A novel downstream Flood Hazard Grade Index incorporating upstream Hydrograph Characteristics to predict Debris Flow RunoffNorio Harada, Kana Nakatani, Masamitsu Fujimoto and Yoshifumi SatofukaE3S Web of Conf., 415 (2023) 05005DOI: https://doi.org/10.1051/e3sconf/202341505005